Waste residue drying control system

Abstract

The utility model provides a waste residue drying control system, and belongs to the technical field of waste treatment. The waste residue drying control system comprises a temperature detection module, a fan, a fan control module, a humidity detection module, a filtering module, a humidity comparison module, a central control module, a first switch and a hot steam flow control module, the output end of the temperature detection module is connected with the hot steam flow control module, and the temperature detection module is used for detecting the temperature in the drying reaction tank; the control end of the fan is connected with the output end of the fan control module, and the fan is used for providing ventilation conditions for the drying reaction tank; the humidity detection module is respectively connected with the input end of the fan control module, the filtering module and the humidity comparison module; the humidity detection module is used for detecting the humidity in the drying reaction tank; the first switch is connected with the hot steam flow control module, the filtering module and the central control module. According to the invention, the drying effect can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of waste treatment, and particularly relates to a waste residue drying control system. BACKGROUND

[0002] With the development of industry, the waste in the production process is also increasing, and the drying of the waste is a key link of the waste. The traditional waste residue drying control system often has defects, and the temperature control is not intelligent enough, which often leads to poor drying effect, so that the dried material does not meet the standard.

[0003] Therefore, an accurate and reliable waste residue drying control system is urgently needed. CONTENT OF THE INVENTION

[0004] The present disclosure provides a waste residue drying control system to solve the problem of poor drying effect.

[0005] The present disclosure provides a waste residue drying control system, which comprises a temperature detection module, a fan, a fan control module, a humidity detection module, a filtering module, a humidity comparison module, a central control module, a first switch and a hot steam flow control module.

[0006] The output end of the temperature detection module is connected with the hot steam flow control module, and the temperature detection module is used for detecting the temperature in the drying reaction tank.

[0007] The control end of the fan is connected with the output end of the fan control module, and the fan is used for providing ventilation conditions for the drying reaction tank.

[0008] The humidity detection module is connected with the input end of the fan control module, the filtering module and the humidity comparison module respectively, and the humidity detection module is used for detecting the humidity in the drying reaction tank.

[0009] The first switch is connected with the hot steam flow control module, the filtering module and the central control module respectively.

[0010] The input end of the humidity comparison module is connected with the filtering module, and the output end of the humidity comparison module is connected with the central control module.

[0011] In an exemplary embodiment of the present disclosure, the hot steam flow control module comprises a first humidity comparator, a second humidity comparator, a third humidity comparator, a priority comparison unit, a flow control unit and a flow electromagnetic valve.

[0012] The inverting input end of the first humidity comparator, the inverting input end of the second humidity comparator and the inverting input end of the third humidity comparator are connected with the filtering module through the first switch.

[0013] The in-phase input end of the first humidity comparator is configured to receive a first humidity reference value Vref1, the in-phase input end of the second humidity comparator is configured to receive a second humidity reference value Vref2, and the in-phase input end of the third humidity comparator is configured to receive a third humidity reference value Vref3;

[0014] The output end of the first humidity comparator, the output end of the second humidity comparator, the output end of the third humidity comparator, and the output end of the temperature detection module are connected with the priority comparison unit.

[0015] The input end of the flow control unit is connected with the output end of the priority comparison unit, and the output end of the flow control unit is connected with the flow electromagnetic valve.

[0016] In an exemplary embodiment of the present disclosure, a waste residue drying control system further comprises a pressure detection module.

[0017] The pressure detection module is connected with the priority comparison unit, and the pressure detection module is configured to detect the pressure of the drying reaction tank.

[0018] In an exemplary embodiment of the present disclosure, the priority comparison unit comprises a priority encoder.

[0019] The output end of the pressure detection module, the output end of the temperature detection module, the output end of the first humidity comparator, the output end of the second humidity comparator, and the output end of the third humidity comparator are connected with a plurality of signal input ends of the priority encoder.

[0020] The plurality of output ends of the priority encoder are connected with the flow control unit.

[0021] In an exemplary embodiment of the present disclosure, the temperature detection module comprises a temperature sensor and a temperature comparator.

[0022] The inverting input end of the temperature comparator is connected with the output end of the temperature sensor.

[0023] The in-phase input end of the temperature comparator is configured to receive a temperature reference value Vref4.

[0024] The output end of the temperature comparator is connected with the hot steam flow control module.

[0025] In an exemplary embodiment of the present disclosure, the fan control module comprises a fourth humidity comparator and a fan control unit.

[0026] The in-phase input end of the fourth humidity comparator is connected with the humidity detection module.

[0027] The inverting input end of the fourth humidity comparator is configured to receive a fourth humidity reference value Vref5.

[0028] The output end of the fourth humidity comparator is connected with the fan control unit.

[0029] In an exemplary embodiment of the present disclosure, the pressure detection module comprises a pressure sensor and a pressure comparator.

[0030] The inverting input end of the pressure comparator is connected with the pressure sensor.

[0031] The non-inverting input end of the pressure comparator is configured to receive a pressure reference value Vref6.

[0032] In an exemplary embodiment of the present disclosure, the waste residue drying control system further comprises an alarm module.

[0033] The alarm module is connected with the pressure detection module.

[0034] The alarm module is configured to perform alarm.

[0035] The waste residue drying control system provided by the embodiments of the present disclosure has the following beneficial effects:

[0036] The temperature detection module of the present disclosure detects the temperature in the drying reaction tank in real time, and feeds back the data to the hot steam flow control module, so that the system can work at a suitable temperature, and the risk caused by excessively high temperature can be avoided. The humidity detection module, humidity comparison module and hot steam flow control module of the present disclosure control the flow of hot steam, so that the hard shell generated on the surface of the drying material due to too fast drying of the drying material can be avoided, and thus the drying effect is poor. The fan of the present disclosure carries away the gas generated during the drying process, which helps to accelerate the evaporation of water in the waste residue and improves the drying effect. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 is a structural schematic diagram of a waste residue drying control system provided by the embodiments of the present disclosure;

[0039] Figure 2 is a structural schematic diagram of a second waste residue drying control system provided by the embodiments of the present disclosure. DETAILED DESCRIPTION

[0040] In order to make the person skilled in the art better understand the present scheme, the technical solutions in the embodiments of the present scheme will be clearly described in combination with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are part of the embodiments of the present scheme, rather than all the embodiments. Based on the embodiments in the present scheme, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present scheme.

[0041] The term "comprising" and other any variations thereof in the specification and claims of the present scheme and the above-mentioned drawings means "including but not limited to", which is intended to cover non-exclusive inclusion and is not limited to the examples listed in the text. In addition, the terms "first" and "second" and the like are used to distinguish different objects, rather than to describe a specific order.

[0042] The implementation of the present disclosure is described in detail below in combination with specific drawings:

[0043] Figure 1 A structural schematic diagram of a waste residue drying control system provided by the embodiments of the present disclosure is provided. Referring to Figure 1 The waste residue drying control system comprises a temperature detection module 10, a fan 11, a fan control module 12, a humidity detection module 13, a filtering module 14, a humidity comparison module 15, a central control module 16, a first switch 17 and a hot steam flow control module 18.

[0044] The output end of the temperature detection module 10 is connected with the hot steam flow control module 18, and the temperature detection module 10 is used for detecting the temperature in the drying reaction tank.

[0045] The control end of the fan 11 is connected with the output end of the fan control module 12, and the fan 11 is used for providing ventilation conditions for the drying reaction tank.

[0046] The humidity detection module 13 is connected with the input end of the fan control module 12, the filtering module 14 and the humidity comparison module 15 respectively, and the humidity detection module 13 is used for detecting the humidity in the drying reaction tank.

[0047] The first switch 17 is connected with the hot steam flow control module 18, the filtering module 14 and the central control module 16 respectively.

[0048] The input end of the humidity comparison module 15 is connected with the filtering module 14, and the output end of the humidity comparison module 15 is connected with the central control module 16.

[0049] In the embodiment, the drying reaction tank contains a sandwich, the drying material is dried inside the drying reaction tank, the drying material can be tar residue, hot steam flows in the sandwich of the drying reaction tank to provide a drying temperature for the drying material, and the drying temperature can be controlled by controlling the flow of the hot steam. The initial state of the first switch 17 is an open state.

[0050] The temperature detection module 10 can be a temperature sensor 101 for detecting the temperature in the drying reaction tank, the fan 11 is configured to carry away the gas and water vapor generated during the drying process, the humidity detection module 13 can be a humidity sensor for detecting the humidity in the drying reaction tank, and since the humidity itself is a real-time changing information and is disturbed by the outside, the humidity signal detected by the humidity sensor is a fluctuating signal. At this time, part of the fluctuation in the humidity signal detected by the humidity sensor can be filtered out by the filtering module 14, so that the detected humidity information is a relatively smooth curve.

[0051] The present application considers that the temperature value at the beginning of the drying process is relatively high, although it can make the humidity decrease rapidly and the water evaporate rapidly, but the water on the surface of the material evaporates too fast, which causes the hard shell to be generated on the surface of the drying material, and further makes it difficult for the water in the drying material to evaporate, so that the drying effect is not good and the humidity is difficult to decrease continuously.

[0052] Therefore, the hot steam flow control module 18 controls the flow of the hot steam, and in the initial stage of the drying process, the drying reaction tank can be provided with heat at a pre-set flow value. It should be noted that the temperature of the drying reaction tank corresponding to the pre-set flow value should not cause the drying to be too fast, and the pre-set flow value can be determined according to experiments. After a period of time, the humidity comparison module 15 can compare the humidity value after filtering with a pre-set humidity value, and when the humidity value is less than the pre-set humidity value, it proves that the water in the drying material has been gradually volatilized, and the temperature can be appropriately increased to accelerate the drying speed. The pre-set humidity value can be determined by experiments or can be set according to the drying material.

[0053] At this time, the humidity comparison module 15 sends "1" to the central control module 16, and the central control module 16 controls the first switch 17 to be closed after receiving "1". The hot steam flow control module 18 controls the flow value of the hot steam according to the humidity value after filtering by the filtering module 14, which can be controlled by controlling the opening degree of the electromagnetic valve.

[0054] When the temperature value detected by the temperature detection module 10 is greater than the pre-set temperature value, it means that the temperature value in the drying reaction tank is too high and is prone to danger, so "0" is sent to the hot steam flow control module 18, and at this time the hot steam flow control module 18 controls the electromagnetic valve to be closed.

[0055] From the above, the present disclosure can detect the temperature in the drying reaction tank in real time through the temperature detection module 10, and feed back the data to the hot steam flow control module 18, so as to ensure that the system can work at a suitable temperature, and avoid the danger caused by too high temperature. The present disclosure can control the flow of hot steam through the humidity detection module 13, the humidity comparison module 15 and the hot steam flow control module 18, so as to avoid the hard shell on the surface of the dried material caused by too fast drying of the dried material, thereby improving the drying effect. The fan 11 can take away the gas generated in the drying process, which is helpful to accelerate the evaporation of water in the waste residue, and improve the drying effect.

[0056] Figure 2 is a structural schematic diagram of a second waste residue drying control system provided by an embodiment of the present disclosure. Referring to Figure 2 In an embodiment of the present disclosure, the hot steam flow control module 18 comprises: a first humidity comparator 181, a second humidity comparator 182, a third humidity comparator 183, a priority comparison unit 184, a flow control unit 185 and a flow electromagnetic valve 186.

[0057] The inverting input end of the first humidity comparator 181, the inverting input end of the second humidity comparator 182 and the inverting input end of the third humidity comparator 183 are connected to the filtering module 14 through the first switch 17.

[0058] The non-inverting input end of the first humidity comparator 181 is used to receive a first humidity reference value Vref1, the non-inverting input end of the second humidity comparator 182 is used to receive a second humidity reference value Vref2, and the non-inverting input end of the third humidity comparator 183 is used to receive a third humidity reference value Vref3.

[0059] The output end of the first humidity comparator 181, the output end of the second humidity comparator 182, the output end of the third humidity comparator 183 and the output end of the temperature detection module 10 are connected to the priority comparison unit 184.

[0060] The input end of the flow control unit 185 is connected to the output end of the priority comparison unit 184, and the output end of the flow control unit 185 is connected to the flow electromagnetic valve 186.

[0061] Figure 2 is a structural schematic diagram of a second waste residue drying control system provided by an embodiment of the present disclosure. Referring to Figure 2 In an embodiment of the present disclosure, the temperature detection module 10 comprises: a temperature sensor 101 and a temperature comparator 102.

[0062] The inverting input end of the temperature comparator 102 is connected to the output end of the temperature sensor 101.

[0063] The in-phase input of the temperature comparator 102 is configured to receive a temperature reference value Vref4.

[0064] The output of the temperature comparator 102 is connected to the hot steam flow control module 18.

[0065] In the embodiment, the first humidity comparator 181, the second humidity comparator 182 and the third humidity comparator 183 are all configured to compare the humidity value with the corresponding humidity reference value. The first humidity reference value Vref1 is greater than the second humidity reference value Vref2, and the second humidity reference value Vref2 is greater than the third humidity reference value Vref3. The priority comparison unit 184 is configured to compare the received information and determine the output according to the preset priority. In the embodiment, the priority of the first humidity comparator 181 is higher than the priority of the second humidity comparator 182, and the priority of the second humidity comparator 182 is higher than the priority of the third humidity comparator 183. For safety consideration, when the temperature is greater than the preset temperature reference value Vref4, no matter whether the information sent by the first humidity comparator 181, the second humidity comparator 182 and the third humidity comparator 183 is “0” or “1”, it does not affect the flow control unit 185 to control the flow electromagnetic valve 186 to be closed, i.e. the priority of the temperature comparator 102 is higher than the priority of the first humidity comparator 181.

[0066] When the humidity value detected by the humidity detection module 13 is greater than the third humidity reference value Vref3 but does not exceed the second humidity reference value Vref2, the third humidity comparator 183 sends “0” to the priority comparison unit 184. At this time, no other comparator sends “0” to the priority comparison unit 184, so that the flow control unit 185 controls the flow electromagnetic valve 186 to increase the valve opening degree, thereby increasing the temperature of the drying reaction tank.

[0067] After a period of time, when the humidity value detected by the humidity detection module 13 is greater than the second humidity reference value Vref2 but does not exceed the first humidity reference value Vref1, the second humidity comparator 182 sends “0” to the priority comparison unit 184, and the third humidity comparator 183 also sends “0” to the priority comparison unit 184. At this time, since the priority of the second humidity comparator 182 is higher than the priority of the third humidity comparator 183, the priority comparison unit 184 controls the flow electromagnetic valve 186 to increase the opening degree again through the flow control unit 185, i.e. shielding the signal of the third humidity comparator 183.

[0068] The opening degree of the flow electromagnetic valve 186 corresponding to the first humidity reference value Vref1 is greater than the opening degree of the flow electromagnetic valve 186 corresponding to the second humidity reference value Vref2, and the opening degree of the flow electromagnetic valve 186 corresponding to the second humidity reference value Vref2 is greater than the opening degree of the flow electromagnetic valve 186 corresponding to the third humidity reference value Vref3.

[0069] From the above, the present disclosure can control the opening of the flow control electromagnetic valve 186 according to different humidity, more accurately control the temperature, accelerate the drying speed and improve the drying effect. The priority comparison unit 184 ensures that when multiple humidity comparators trigger at the same time, the control can be performed according to the preset priority order, avoiding the conflict and confusion of the control signal, and making the control of the system more reliable.

[0070] Figure 2 is a structural schematic diagram of a second waste residue drying control system provided by an embodiment of the present disclosure. Referring to Figure 2 In an embodiment of the present disclosure, a waste residue drying control system further comprises a pressure detection module 19.

[0071] The pressure detection module 19 is connected with the priority comparison unit 184, and the pressure detection module 19 is used for detecting the pressure of the drying reaction tank.

[0072] In an embodiment of the present disclosure, the priority comparison unit 184 comprises a priority encoder 1841.

[0073] The output end of the pressure detection module 19, the output end of the temperature detection module 10, the output end of the first humidity comparator 181, the output end of the second humidity comparator 182 and the output end of the third humidity comparator 183 are all connected with a plurality of signal input ends of the priority encoder 1841.

[0074] A plurality of output ends of the priority encoder 1841 are all connected with the flow control unit 185.

[0075] In an embodiment of the present disclosure, the pressure detection module 19 comprises a pressure sensor 191 and a pressure comparator 192.

[0076] The inverting input end of the pressure comparator 192 is connected with the pressure sensor 191.

[0077] The non-inverting input end of the pressure comparator 192 is used for receiving a pressure reference value Vref6.

[0078] In the embodiment, considering that the hot steam is continuously injected into the drying reaction tank, and the gas volatilized during the drying process, the pressure value may be too large, so when the pressure value detected by the pressure sensor 191 is greater than the pressure reference value Vref6, the pressure comparator 192 sends “0” to the priority encoder 1841. The priority of the pressure comparator 192 is higher than the priority of the temperature comparator 102, and the priority of the pressure comparator 192 is also higher than the priority of the first humidity comparator 181. The pressure reference value Vref6 can be determined according to experiments.

[0079] In the embodiment, the output end of the pressure detection module 19 is connected with the I7 pin of the priority encoder 1841.

[0080] The output end of the temperature detection module 10 is connected with the I6 pin of the priority encoder 1841.

[0081] The output end of the first humidity comparator 181 is connected with the I5 pin of the priority encoder 1841.

[0082] The output end of the second humidity comparator 182 is connected with the I4 pin of the priority encoder 1841.

[0083] The output end of the third humidity comparator 183 is connected with the I3 pin of the priority encoder 1841.

[0084] The A0 pin, the A1 pin and the A2 pin of the priority encoder 1841 are connected with the flow control unit 185.

[0085] The I7 to I1 pins of the priority encoder 1841 have gradually decreasing priorities, the priority encoder 1841 can be 74LS148, and is low active, that is, valid when the input is “0” and invalid when the input is “1”, when the I7 pin input is “0”, no matter what the input of other pins is, the outputs of A0, A1 and A2 are all “0”, that is, “000”, when the I6 pin input is “0” and the I7 pin input is “1”, no matter what the input of other pins is, the output is “001”, and so on.

[0086] The flow control unit 185 is configured to receive “000” or “001” to control the flow electromagnetic valve 186 to be closed, and receive “010”, “011” or “100” to control the flow electromagnetic valve 186 to reach its corresponding valve opening degree.

[0087] From the above, it can be concluded that the pressure detection module 19 can detect the pressure change in the drying reaction tank in real time, which helps to timely discover and handle the overpressure situation caused by hot steam injection and volatile gas accumulation, so as to avoid safety hazards. The priority encoder 1841 can orderly process according to different input signals and their priorities in the embodiment, so as to ensure that when multiple contradictory control information appears at the same time, the response can be made according to the preset priority order, the conflict and confusion of the control signal are effectively avoided, and the drying effect is improved.

[0088] Figure 2 is a structural schematic diagram of a second waste residue drying control system provided by the embodiment of the disclosure. Referring to Figure 2 In an embodiment of the disclosure, the fan control module 12 comprises a fourth humidity comparator 121 and a fan control unit 122.

[0089] The in-phase input end of the fourth humidity comparator 121 is connected with the humidity detection module 13;

[0090] The anti-phase input end of the fourth humidity comparator 121 is used for receiving the fourth humidity reference value Vref5;

[0091] The output end of the fourth humidity comparator 121 is connected with the fan control unit 122.

[0092] In an embodiment of the present disclosure, the waste residue drying control system further comprises an alarm module 20;

[0093] The alarm module 20 is connected with the pressure detection module 19;

[0094] The alarm module 20 is configured to perform alarm.

[0095] In the embodiment, when the humidity value received by the fourth humidity comparator 121 is greater than the fourth humidity reference value Vref5, it indicates that the wind speed at this time is small, and a greater wind speed is needed to quickly take away the moisture dried out, at this time the fourth humidity comparator 121 sends "1" to the fan control unit 122, at this time the fan control unit 122 controls the fan 11 to increase the power to provide a stronger wind speed.

[0096] In the embodiment, when the pressure value detected by the pressure detection module 19 is greater than the pressure reference value Vref6, not only the flow electromagnetic valve 186 is controlled to be closed by the hot steam flow control module 18, but also "0" is sent to the alarm module 20, and the alarm module 20 is configured to perform alarm when receiving "0", which can be performed by a buzzer and an indicator light to remind the relevant personnel that a danger may occur and to be handled in time.

[0097] From the above, it can be concluded that the fourth humidity comparator 121 can detect the humidity value provided by the humidity detection module 13 in real time, when the humidity value exceeds the reference value, the fan control unit 122 controls the fan 11 to increase the power to increase the wind speed, thereby accelerating the drying process of the waste residue. The alarm module 20 in the embodiment can remind the relevant personnel that a danger may occur and to be handled in time, thereby improving the reliability and safety of the present disclosure.

[0098] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the foregoing embodiments of the present disclosure have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A waste residue drying control system, characterized by, The application relates to a dry distillation reaction tank temperature and humidity control system. The temperature detection module, a fan, a fan control module, a humidity detection module, a filter module, a humidity comparison module, a central control module, a first switch and a hot steam flow control module are connected. The output end of the temperature detection module is connected with the hot steam flow control module, and the temperature detection module is used for detecting the temperature in a dry distillation reaction tank. The control end of the fan is connected with the output end of the fan control module, and the fan is used for providing ventilation conditions for the dry distillation reaction tank. The humidity detection module is connected with the input end of the fan control module, the filter module and the humidity comparison module, and the humidity detection module is used for detecting the humidity in the dry distillation reaction tank. The first switch is connected with the hot steam flow control module, the filter module and the central control module. The input end of the humidity comparison module is connected with the filter module, and the output end of the humidity comparison module is connected with the central control module.

2. A waste residue drying control system as claimed in claim 1, wherein, The hot steam flow control module comprises a first humidity comparator, a second humidity comparator, a third humidity comparator, a priority comparison unit, a flow control unit and a flow electromagnetic valve. The non-inverted input end of the first humidity comparator, the non-inverted input end of the second humidity comparator and the non-inverted input end of the third humidity comparator are connected with the filter module through the first switch. The same-phase input end of the first humidity comparator is used for receiving a first humidity reference value Vref1, the same-phase input end of the second humidity comparator is used for receiving a second humidity reference value Vref2, and the same-phase input end of the third humidity comparator is used for receiving a third humidity reference value Vref3. The output end of the first humidity comparator, the output end of the second humidity comparator, the output end of the third humidity comparator and the output end of the temperature detection module are connected with the priority comparison unit. The input end of the flow control unit is connected with the output end of the priority comparison unit, and the output end of the flow control unit is connected with the flow electromagnetic valve.

3. A waste residue drying control system as claimed in claim 2, wherein Further comprising: a pressure detection module; The pressure detection module is connected with the priority comparison unit, and the pressure detection module is used for detecting the pressure of the dry distillation reaction tank.

4. A waste residue drying control system as claimed in claim 3, wherein The priority comparison unit comprises a priority encoder. The output end of the pressure detection module, the output end of the temperature detection module, the output end of the first humidity comparator, the output end of the second humidity comparator and the output end of the third humidity comparator are connected with a plurality of signal input ends of the priority encoder. The plurality of output ends of the priority encoder are connected with the flow control unit.

5. A waste residue drying control system as claimed in claim 1, wherein, The temperature detection module comprises a temperature sensor and a temperature comparator. The non-inverted input end of the temperature comparator is connected with the output end of the temperature sensor. The same-phase input end of the temperature comparator is used for receiving a temperature reference value Vref4. The output end of the temperature comparator is connected with the hot steam flow control module.

6. A waste residue drying control system as claimed in claim 1, wherein, The fan control module comprises a fourth humidity comparator and a fan control unit. The same-phase input end of the fourth humidity comparator is connected with the humidity detection module. An inverting input terminal of the fourth humidity comparator is configured to receive a fourth humidity reference value Vref5; An output terminal of the fourth humidity comparator is connected with the fan control unit.

7. A waste drying control system as claimed in claim 3, wherein, The pressure detection module comprises a pressure sensor and a pressure comparator; An inverting input terminal of the pressure comparator is connected with the pressure sensor; A non-inverting input terminal of the pressure comparator is configured to receive a pressure reference value Vref6.

8. A waste residue drying control system as claimed in claim 3, wherein Further comprising: An alarm module; The alarm module is connected with the pressure detection module; The alarm module is configured to perform alarm.

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